#include <bits/stdc++.h>
using namespace std;

int main(void)
{
    {        
        int i = 2;
        int j = 2;
        int s=(i++)+(++j);
        cout << s << endl;
    }
    
    {        
        int c, a;
        int b=a=((c=5)*2+7)/4;
        cout << b << endl;
    }
    

    {        
        int a = 5;
        int b = 0;
        int &r = a;
        r = b++;
        cout << a << r << b;
    }
    

    {        
        uint32_t a = 20;
        uint32_t b = 14;
        int c = a ^ b;
        cout << c << endl;
    }
    

    {
        struct A
        {
            ~A() { cout << "~A" << endl; }
        };
        struct B : public A
        {
            virtual ~B() { cout << "~B" << endl; }
        };
        
        A *a = new B;
        delete a;
    }
    
    {        
        double a = 52.0562;
        float b = 14.25;
        int c;
        c = (int) a;
        a = (double) b;
        cout << c << " " << a << endl;
    }
    
    {        
        struct Base 
        {
            virtual void print( int x = 1)
            {
                cout << "Base: " << x << endl; 
            }
        };    
        
        struct Derived : Base 
        {
            virtual void print( int x = 2)
            {
                cout << "Derived: " << x << endl;                
            }
        };

        Base * b = new Derived;
        b->print();
    }
    
    {
        struct A { void f() {} };
        struct B { int f() {return 0;}  };
        struct C : A, B { };
        
        C* pc = new C;
        // pc->A(); // invalid use of main()::A::A
        pc->A::f();
        pc->B::f();
        // pc->A::B::f(); // A::B has not been declared
    }    

    {
        struct A
        {
            virtual ~A() { f(); }
            virtual void f() { cout << "A::f" << endl; }        
        };
        struct B : public A
        {
            ~B() {}
            
            virtual void f() { cout << "B::f" << endl; }   
        };

        A* a =new B;
        delete a;
    }
    
    return 0;
}